公开(公告)号：US3882350A

公开(公告)日：1975-05-06

申请号：US40108973

申请日：1973-09-26

Applicant: RCA CORP

Inventor： HALL CYRIL JOHN

IPC: H04N9/28 ,  H01J29/50

CPC classification number: H04N9/28

Abstract: A dynamic convergence circuit includes a source of waveforms at a first frequency coupled to a waveshaping network for producing a predetermined current wave through a convergence coil. A modulating stage including an active current conducting device is coupled to the convergence coil in a direct current manner. An input electrode of the active current conducting device is coupled to a source of second frequency waveforms which control the conduction of the device for selectively loading the convergence coil and modulating the first frequency convergence coil current at the second waveform frequency. The active current conducting device may be coupled to the convergence coil by means of a unidirectional current conducting device such that only portions of the convergence coil current of one polarity are modulated.

Abstract translation: 动态会聚电路包括耦合到波形网络的第一频率的波形源，用于通过会聚线圈产生预定的电流波。 包括有源电流传导装置的调制级以直流方式耦合到会聚线圈。 有源电流传导器件的输入电极耦合到第二频率波形源，该第二频率波形控制器件的导通，用于选择性地加载会聚线圈，并以第二波形频率调制第一频率会聚线圈电流。 有源电流传导器件可以通过单向电流传导器件耦合到会聚线圈，使得只有一个极性的会聚线圈电流的一部分被调制。